The　ultimate　limit　equilibrium　method,　modified　compression　field　theory　and　plastic　thoery　were　used　to　calculate　the　shear　capacity　of　ultra-high　performance　concrete　beams.　Based　on　the　simplified　Rankine＇s　failure　criteria,　the　limit　equilibrium　method　equations　to　solve　the　ultra-high　performance　concrete　beams　shear　bearing　capacity　were　deduced;　the　equations　of　the　modified　compression　field　theory　were　modified　to　be　suitable　for　the　ultra-high　performance　concrete　beams;　the　plastic　coefficient　of　ultra-high　performance　concrete　was　proposed　to　calculate　the　ultra-high　performance　concrete　beams　shear　bearing　capacity　in　plasticity　theory.　The　calculation　results　of　the　9　ultra-high　performance　concrete　beams　and　other　researcher＇s　17　beams　show　that　the　three　methods　all　can　well　predict　the　shear　bearing　capacity　of　ultra-high　performance　concrete　beams,　the　results　in　modified　compression　field　theory　is　the　most　conservative,　the　results　in　limit　equilibrium　method　is　the　most　close　to　the　test　values　and　the　variation　coefficient　of　the　results　is　minimum.　©,　2015,　Huazhong　Keji　Daxue　Xuebao　(Ziran　Kexue　Ban)/Journal　of　Huazhong　University　of　Science　and　Technology　(Natural　Science　Edition).　All　right　reserved.